JTRA vs ALVA Rainbow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JTRA
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境腾科技远程支持产品可以让远程专家足不出户，通过普通的电脑、网页、或者手机，与前线工程师头戴的HoloLens2设备进行实时音视频通讯。专家可以如亲临现场版看到前线工程师的视野，并且可以准确的对前线3D空间的设备进行标注。前线工程师可以解放双手进行操作，更高效的解决问题。
ALVA Rainbow
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ALVA Rainbow是一款第四代计算浪潮下衍生的远程专家示教工具。在视频通话功能之上，Rainbow加入实时标注与模型投放两大主打功能，利用AR技术，将远程专家“搬”到现场，重塑传统场景中远程专家亲赴现场的教学模式。颠覆低效沟通，释放无限潜力。 l AR+高清视频会议 支持高清稳定视频通话、多端屏幕共享、实时文字与文件传输 l AR实时空间标注 实时标注锚定，通讯过程中平均标注精度误差小于100像素 l AR+数字资源展示 实现相关数据信息与设备一对一结合与AR呈现 l AR模型投放 Model Recognition算法可实现无先验信息下3D模型与设备的匹配 l 多终端灵活部署 支持多系统，多终端，混合部署方式
Screenshots
Verdict
The clearest difference is update cadence: ALVA Rainbow at fortnightly against JTRA's monthly. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
JTRA ships an update monthly, ALVA Rainbow fortnightly. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.
| Parameter | JTRA | ALVA Rainbow |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 407 MB | 254 MB |
| Age rating | 4+ | 4+ |
| Developer | Jingteng Information Technology Co., Ltd | Alva (Beijing) Technology Co., Ltd. |
In-app purchases
JTRA
No in-app purchases
ALVA Rainbow
No in-app purchases
